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Finding the Fourth Proportional to 5,660.64, 7,811.64 and 3,143.16

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Solution

The fourth proportional to 5,660.64, 7,811.64 and 3,143.16 is: 4,337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,660.64 : 7,811.64 = 3,143.16 : x
  2. Step 2: Convert to fraction form
    5,660.64/7,811.64 = 3,143.16/x
  3. Step 3: Cross multiply
    5,660.64x = 7,811.64 × 3,143.16
  4. Step 4: Simplify right side
    5,660.64x = 24,553,234.38
  5. Step 5: Solve for x
    x = 24,553,234.38/5,660.64
  6. Step 6: Final answer
    x = 4,337.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.